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src/share/classes/com/sun/tools/javac/jvm/ClassReader.java@2bf4c132bf90
src/share/classes/com/sun/tools/javac/jvm/ClassReader.java
Mon, 02 Sep 2013 22:44:06 +0100
- author
- vromero
- date
- Mon, 02 Sep 2013 22:44:06 +0100
- changeset 2001
- 2bf4c132bf90
- parent 1820
- 6b48ebae2569
- child 2007
- a76c663a9cac
- permissions
- -rw-r--r--
8022162: Incorrect signature determination for certain inner class generics
Reviewed-by: jjg
1 /*
2 * Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
26 package com.sun.tools.javac.jvm;
28 import java.io.*;
29 import java.net.URI;
30 import java.net.URISyntaxException;
31 import java.nio.CharBuffer;
32 import java.util.Arrays;
33 import java.util.EnumSet;
34 import java.util.HashMap;
35 import java.util.HashSet;
36 import java.util.Map;
37 import java.util.Set;
38 import javax.lang.model.SourceVersion;
39 import javax.tools.JavaFileObject;
40 import javax.tools.JavaFileManager;
41 import javax.tools.JavaFileManager.Location;
42 import javax.tools.StandardJavaFileManager;
44 import static javax.tools.StandardLocation.*;
46 import com.sun.tools.javac.comp.Annotate;
47 import com.sun.tools.javac.code.*;
48 import com.sun.tools.javac.code.Lint.LintCategory;
49 import com.sun.tools.javac.code.Type.*;
50 import com.sun.tools.javac.code.Symbol.*;
51 import com.sun.tools.javac.code.Symtab;
52 import com.sun.tools.javac.file.BaseFileObject;
53 import com.sun.tools.javac.util.*;
54 import com.sun.tools.javac.util.JCDiagnostic.DiagnosticPosition;
56 import static com.sun.tools.javac.code.Flags.*;
57 import static com.sun.tools.javac.code.Kinds.*;
58 import static com.sun.tools.javac.code.TypeTag.CLASS;
59 import static com.sun.tools.javac.jvm.ClassFile.*;
60 import static com.sun.tools.javac.jvm.ClassFile.Version.*;
62 import static com.sun.tools.javac.main.Option.*;
64 /** This class provides operations to read a classfile into an internal
65 * representation. The internal representation is anchored in a
66 * ClassSymbol which contains in its scope symbol representations
67 * for all other definitions in the classfile. Top-level Classes themselves
68 * appear as members of the scopes of PackageSymbols.
69 *
70 * <p><b>This is NOT part of any supported API.
71 * If you write code that depends on this, you do so at your own risk.
72 * This code and its internal interfaces are subject to change or
73 * deletion without notice.</b>
74 */
75 public class ClassReader implements Completer {
76 /** The context key for the class reader. */
77 protected static final Context.Key<ClassReader> classReaderKey =
78 new Context.Key<ClassReader>();
80 public static final int INITIAL_BUFFER_SIZE = 0x0fff0;
82 Annotate annotate;
84 /** Switch: verbose output.
85 */
86 boolean verbose;
88 /** Switch: check class file for correct minor version, unrecognized
89 * attributes.
90 */
91 boolean checkClassFile;
93 /** Switch: read constant pool and code sections. This switch is initially
94 * set to false but can be turned on from outside.
95 */
96 public boolean readAllOfClassFile = false;
98 /** Switch: read GJ signature information.
99 */
100 boolean allowGenerics;
102 /** Switch: read varargs attribute.
103 */
104 boolean allowVarargs;
106 /** Switch: allow annotations.
107 */
108 boolean allowAnnotations;
110 /** Switch: allow simplified varargs.
111 */
112 boolean allowSimplifiedVarargs;
114 /** Lint option: warn about classfile issues
115 */
116 boolean lintClassfile;
118 /** Switch: allow default methods
119 */
120 boolean allowDefaultMethods;
122 /** Switch: preserve parameter names from the variable table.
123 */
124 public boolean saveParameterNames;
126 /**
127 * Switch: cache completion failures unless -XDdev is used
128 */
129 private boolean cacheCompletionFailure;
131 /**
132 * Switch: prefer source files instead of newer when both source
133 * and class are available
134 **/
135 public boolean preferSource;
137 /**
138 * The currently selected profile.
139 */
140 public final Profile profile;
142 /** The log to use for verbose output
143 */
144 final Log log;
146 /** The symbol table. */
147 Symtab syms;
149 Types types;
151 /** The name table. */
152 final Names names;
154 /** Force a completion failure on this name
155 */
156 final Name completionFailureName;
158 /** Access to files
159 */
160 private final JavaFileManager fileManager;
162 /** Factory for diagnostics
163 */
164 JCDiagnostic.Factory diagFactory;
166 /** Can be reassigned from outside:
167 * the completer to be used for ".java" files. If this remains unassigned
168 * ".java" files will not be loaded.
169 */
170 public SourceCompleter sourceCompleter = null;
172 /** A hashtable containing the encountered top-level and member classes,
173 * indexed by flat names. The table does not contain local classes.
174 */
175 private Map<Name,ClassSymbol> classes;
177 /** A hashtable containing the encountered packages.
178 */
179 private Map<Name, PackageSymbol> packages;
181 /** The current scope where type variables are entered.
182 */
183 protected Scope typevars;
185 /** The path name of the class file currently being read.
186 */
187 protected JavaFileObject currentClassFile = null;
189 /** The class or method currently being read.
190 */
191 protected Symbol currentOwner = null;
193 /** The buffer containing the currently read class file.
194 */
195 byte[] buf = new byte[INITIAL_BUFFER_SIZE];
197 /** The current input pointer.
198 */
199 protected int bp;
201 /** The objects of the constant pool.
202 */
203 Object[] poolObj;
205 /** For every constant pool entry, an index into buf where the
206 * defining section of the entry is found.
207 */
208 int[] poolIdx;
210 /** The major version number of the class file being read. */
211 int majorVersion;
212 /** The minor version number of the class file being read. */
213 int minorVersion;
215 /** A table to hold the constant pool indices for method parameter
216 * names, as given in LocalVariableTable attributes.
217 */
218 int[] parameterNameIndices;
220 /**
221 * Whether or not any parameter names have been found.
222 */
223 boolean haveParameterNameIndices;
225 /** Set this to false every time we start reading a method
226 * and are saving parameter names. Set it to true when we see
227 * MethodParameters, if it's set when we see a LocalVariableTable,
228 * then we ignore the parameter names from the LVT.
229 */
230 boolean sawMethodParameters;
232 /**
233 * The set of attribute names for which warnings have been generated for the current class
234 */
235 Set<Name> warnedAttrs = new HashSet<Name>();
237 /** Get the ClassReader instance for this invocation. */
238 public static ClassReader instance(Context context) {
239 ClassReader instance = context.get(classReaderKey);
240 if (instance == null)
241 instance = new ClassReader(context, true);
242 return instance;
243 }
245 /** Initialize classes and packages, treating this as the definitive classreader. */
246 public void init(Symtab syms) {
247 init(syms, true);
248 }
250 /** Initialize classes and packages, optionally treating this as
251 * the definitive classreader.
252 */
253 private void init(Symtab syms, boolean definitive) {
254 if (classes != null) return;
256 if (definitive) {
257 Assert.check(packages == null || packages == syms.packages);
258 packages = syms.packages;
259 Assert.check(classes == null || classes == syms.classes);
260 classes = syms.classes;
261 } else {
262 packages = new HashMap<Name, PackageSymbol>();
263 classes = new HashMap<Name, ClassSymbol>();
264 }
266 packages.put(names.empty, syms.rootPackage);
267 syms.rootPackage.completer = this;
268 syms.unnamedPackage.completer = this;
269 }
271 /** Construct a new class reader, optionally treated as the
272 * definitive classreader for this invocation.
273 */
274 protected ClassReader(Context context, boolean definitive) {
275 if (definitive) context.put(classReaderKey, this);
277 names = Names.instance(context);
278 syms = Symtab.instance(context);
279 types = Types.instance(context);
280 fileManager = context.get(JavaFileManager.class);
281 if (fileManager == null)
282 throw new AssertionError("FileManager initialization error");
283 diagFactory = JCDiagnostic.Factory.instance(context);
285 init(syms, definitive);
286 log = Log.instance(context);
288 Options options = Options.instance(context);
289 annotate = Annotate.instance(context);
290 verbose = options.isSet(VERBOSE);
291 checkClassFile = options.isSet("-checkclassfile");
293 Source source = Source.instance(context);
294 allowGenerics = source.allowGenerics();
295 allowVarargs = source.allowVarargs();
296 allowAnnotations = source.allowAnnotations();
297 allowSimplifiedVarargs = source.allowSimplifiedVarargs();
298 allowDefaultMethods = source.allowDefaultMethods();
300 saveParameterNames = options.isSet("save-parameter-names");
301 cacheCompletionFailure = options.isUnset("dev");
302 preferSource = "source".equals(options.get("-Xprefer"));
304 profile = Profile.instance(context);
306 completionFailureName =
307 options.isSet("failcomplete")
308 ? names.fromString(options.get("failcomplete"))
309 : null;
311 typevars = new Scope(syms.noSymbol);
313 lintClassfile = Lint.instance(context).isEnabled(LintCategory.CLASSFILE);
315 initAttributeReaders();
316 }
318 /** Add member to class unless it is synthetic.
319 */
320 private void enterMember(ClassSymbol c, Symbol sym) {
321 // Synthetic members are not entered -- reason lost to history (optimization?).
322 // Lambda methods must be entered because they may have inner classes (which reference them)
323 if ((sym.flags_field & (SYNTHETIC|BRIDGE)) != SYNTHETIC || sym.name.startsWith(names.lambda))
324 c.members_field.enter(sym);
325 }
327 /************************************************************************
328 * Error Diagnoses
329 ***********************************************************************/
332 public class BadClassFile extends CompletionFailure {
333 private static final long serialVersionUID = 0;
335 public BadClassFile(TypeSymbol sym, JavaFileObject file, JCDiagnostic diag) {
336 super(sym, createBadClassFileDiagnostic(file, diag));
337 }
338 }
339 // where
340 private JCDiagnostic createBadClassFileDiagnostic(JavaFileObject file, JCDiagnostic diag) {
341 String key = (file.getKind() == JavaFileObject.Kind.SOURCE
342 ? "bad.source.file.header" : "bad.class.file.header");
343 return diagFactory.fragment(key, file, diag);
344 }
346 public BadClassFile badClassFile(String key, Object... args) {
347 return new BadClassFile (
348 currentOwner.enclClass(),
349 currentClassFile,
350 diagFactory.fragment(key, args));
351 }
353 /************************************************************************
354 * Buffer Access
355 ***********************************************************************/
357 /** Read a character.
358 */
359 char nextChar() {
360 return (char)(((buf[bp++] & 0xFF) << 8) + (buf[bp++] & 0xFF));
361 }
363 /** Read a byte.
364 */
365 int nextByte() {
366 return buf[bp++] & 0xFF;
367 }
369 /** Read an integer.
370 */
371 int nextInt() {
372 return
373 ((buf[bp++] & 0xFF) << 24) +
374 ((buf[bp++] & 0xFF) << 16) +
375 ((buf[bp++] & 0xFF) << 8) +
376 (buf[bp++] & 0xFF);
377 }
379 /** Extract a character at position bp from buf.
380 */
381 char getChar(int bp) {
382 return
383 (char)(((buf[bp] & 0xFF) << 8) + (buf[bp+1] & 0xFF));
384 }
386 /** Extract an integer at position bp from buf.
387 */
388 int getInt(int bp) {
389 return
390 ((buf[bp] & 0xFF) << 24) +
391 ((buf[bp+1] & 0xFF) << 16) +
392 ((buf[bp+2] & 0xFF) << 8) +
393 (buf[bp+3] & 0xFF);
394 }
397 /** Extract a long integer at position bp from buf.
398 */
399 long getLong(int bp) {
400 DataInputStream bufin =
401 new DataInputStream(new ByteArrayInputStream(buf, bp, 8));
402 try {
403 return bufin.readLong();
404 } catch (IOException e) {
405 throw new AssertionError(e);
406 }
407 }
409 /** Extract a float at position bp from buf.
410 */
411 float getFloat(int bp) {
412 DataInputStream bufin =
413 new DataInputStream(new ByteArrayInputStream(buf, bp, 4));
414 try {
415 return bufin.readFloat();
416 } catch (IOException e) {
417 throw new AssertionError(e);
418 }
419 }
421 /** Extract a double at position bp from buf.
422 */
423 double getDouble(int bp) {
424 DataInputStream bufin =
425 new DataInputStream(new ByteArrayInputStream(buf, bp, 8));
426 try {
427 return bufin.readDouble();
428 } catch (IOException e) {
429 throw new AssertionError(e);
430 }
431 }
433 /************************************************************************
434 * Constant Pool Access
435 ***********************************************************************/
437 /** Index all constant pool entries, writing their start addresses into
438 * poolIdx.
439 */
440 void indexPool() {
441 poolIdx = new int[nextChar()];
442 poolObj = new Object[poolIdx.length];
443 int i = 1;
444 while (i < poolIdx.length) {
445 poolIdx[i++] = bp;
446 byte tag = buf[bp++];
447 switch (tag) {
448 case CONSTANT_Utf8: case CONSTANT_Unicode: {
449 int len = nextChar();
450 bp = bp + len;
451 break;
452 }
453 case CONSTANT_Class:
454 case CONSTANT_String:
455 case CONSTANT_MethodType:
456 bp = bp + 2;
457 break;
458 case CONSTANT_MethodHandle:
459 bp = bp + 3;
460 break;
461 case CONSTANT_Fieldref:
462 case CONSTANT_Methodref:
463 case CONSTANT_InterfaceMethodref:
464 case CONSTANT_NameandType:
465 case CONSTANT_Integer:
466 case CONSTANT_Float:
467 case CONSTANT_InvokeDynamic:
468 bp = bp + 4;
469 break;
470 case CONSTANT_Long:
471 case CONSTANT_Double:
472 bp = bp + 8;
473 i++;
474 break;
475 default:
476 throw badClassFile("bad.const.pool.tag.at",
477 Byte.toString(tag),
478 Integer.toString(bp -1));
479 }
480 }
481 }
483 /** Read constant pool entry at start address i, use pool as a cache.
484 */
485 Object readPool(int i) {
486 Object result = poolObj[i];
487 if (result != null) return result;
489 int index = poolIdx[i];
490 if (index == 0) return null;
492 byte tag = buf[index];
493 switch (tag) {
494 case CONSTANT_Utf8:
495 poolObj[i] = names.fromUtf(buf, index + 3, getChar(index + 1));
496 break;
497 case CONSTANT_Unicode:
498 throw badClassFile("unicode.str.not.supported");
499 case CONSTANT_Class:
500 poolObj[i] = readClassOrType(getChar(index + 1));
501 break;
502 case CONSTANT_String:
503 // FIXME: (footprint) do not use toString here
504 poolObj[i] = readName(getChar(index + 1)).toString();
505 break;
506 case CONSTANT_Fieldref: {
507 ClassSymbol owner = readClassSymbol(getChar(index + 1));
508 NameAndType nt = (NameAndType)readPool(getChar(index + 3));
509 poolObj[i] = new VarSymbol(0, nt.name, nt.uniqueType.type, owner);
510 break;
511 }
512 case CONSTANT_Methodref:
513 case CONSTANT_InterfaceMethodref: {
514 ClassSymbol owner = readClassSymbol(getChar(index + 1));
515 NameAndType nt = (NameAndType)readPool(getChar(index + 3));
516 poolObj[i] = new MethodSymbol(0, nt.name, nt.uniqueType.type, owner);
517 break;
518 }
519 case CONSTANT_NameandType:
520 poolObj[i] = new NameAndType(
521 readName(getChar(index + 1)),
522 readType(getChar(index + 3)), types);
523 break;
524 case CONSTANT_Integer:
525 poolObj[i] = getInt(index + 1);
526 break;
527 case CONSTANT_Float:
528 poolObj[i] = new Float(getFloat(index + 1));
529 break;
530 case CONSTANT_Long:
531 poolObj[i] = new Long(getLong(index + 1));
532 break;
533 case CONSTANT_Double:
534 poolObj[i] = new Double(getDouble(index + 1));
535 break;
536 case CONSTANT_MethodHandle:
537 skipBytes(4);
538 break;
539 case CONSTANT_MethodType:
540 skipBytes(3);
541 break;
542 case CONSTANT_InvokeDynamic:
543 skipBytes(5);
544 break;
545 default:
546 throw badClassFile("bad.const.pool.tag", Byte.toString(tag));
547 }
548 return poolObj[i];
549 }
551 /** Read signature and convert to type.
552 */
553 Type readType(int i) {
554 int index = poolIdx[i];
555 return sigToType(buf, index + 3, getChar(index + 1));
556 }
558 /** If name is an array type or class signature, return the
559 * corresponding type; otherwise return a ClassSymbol with given name.
560 */
561 Object readClassOrType(int i) {
562 int index = poolIdx[i];
563 int len = getChar(index + 1);
564 int start = index + 3;
565 Assert.check(buf[start] == '[' || buf[start + len - 1] != ';');
566 // by the above assertion, the following test can be
567 // simplified to (buf[start] == '[')
568 return (buf[start] == '[' || buf[start + len - 1] == ';')
569 ? (Object)sigToType(buf, start, len)
570 : (Object)enterClass(names.fromUtf(internalize(buf, start,
571 len)));
572 }
574 /** Read signature and convert to type parameters.
575 */
576 List<Type> readTypeParams(int i) {
577 int index = poolIdx[i];
578 return sigToTypeParams(buf, index + 3, getChar(index + 1));
579 }
581 /** Read class entry.
582 */
583 ClassSymbol readClassSymbol(int i) {
584 return (ClassSymbol) (readPool(i));
585 }
587 /** Read name.
588 */
589 Name readName(int i) {
590 return (Name) (readPool(i));
591 }
593 /************************************************************************
594 * Reading Types
595 ***********************************************************************/
597 /** The unread portion of the currently read type is
598 * signature[sigp..siglimit-1].
599 */
600 byte[] signature;
601 int sigp;
602 int siglimit;
603 boolean sigEnterPhase = false;
605 /** Convert signature to type, where signature is a byte array segment.
606 */
607 Type sigToType(byte[] sig, int offset, int len) {
608 signature = sig;
609 sigp = offset;
610 siglimit = offset + len;
611 return sigToType();
612 }
614 /** Convert signature to type, where signature is implicit.
615 */
616 Type sigToType() {
617 switch ((char) signature[sigp]) {
618 case 'T':
619 sigp++;
620 int start = sigp;
621 while (signature[sigp] != ';') sigp++;
622 sigp++;
623 return sigEnterPhase
624 ? Type.noType
625 : findTypeVar(names.fromUtf(signature, start, sigp - 1 - start));
626 case '+': {
627 sigp++;
628 Type t = sigToType();
629 return new WildcardType(t, BoundKind.EXTENDS,
630 syms.boundClass);
631 }
632 case '*':
633 sigp++;
634 return new WildcardType(syms.objectType, BoundKind.UNBOUND,
635 syms.boundClass);
636 case '-': {
637 sigp++;
638 Type t = sigToType();
639 return new WildcardType(t, BoundKind.SUPER,
640 syms.boundClass);
641 }
642 case 'B':
643 sigp++;
644 return syms.byteType;
645 case 'C':
646 sigp++;
647 return syms.charType;
648 case 'D':
649 sigp++;
650 return syms.doubleType;
651 case 'F':
652 sigp++;
653 return syms.floatType;
654 case 'I':
655 sigp++;
656 return syms.intType;
657 case 'J':
658 sigp++;
659 return syms.longType;
660 case 'L':
661 {
662 // int oldsigp = sigp;
663 Type t = classSigToType();
664 if (sigp < siglimit && signature[sigp] == '.')
665 throw badClassFile("deprecated inner class signature syntax " +
666 "(please recompile from source)");
667 /*
668 System.err.println(" decoded " +
669 new String(signature, oldsigp, sigp-oldsigp) +
670 " => " + t + " outer " + t.outer());
671 */
672 return t;
673 }
674 case 'S':
675 sigp++;
676 return syms.shortType;
677 case 'V':
678 sigp++;
679 return syms.voidType;
680 case 'Z':
681 sigp++;
682 return syms.booleanType;
683 case '[':
684 sigp++;
685 return new ArrayType(sigToType(), syms.arrayClass);
686 case '(':
687 sigp++;
688 List<Type> argtypes = sigToTypes(')');
689 Type restype = sigToType();
690 List<Type> thrown = List.nil();
691 while (signature[sigp] == '^') {
692 sigp++;
693 thrown = thrown.prepend(sigToType());
694 }
695 return new MethodType(argtypes,
696 restype,
697 thrown.reverse(),
698 syms.methodClass);
699 case '<':
700 typevars = typevars.dup(currentOwner);
701 Type poly = new ForAll(sigToTypeParams(), sigToType());
702 typevars = typevars.leave();
703 return poly;
704 default:
705 throw badClassFile("bad.signature",
706 Convert.utf2string(signature, sigp, 10));
707 }
708 }
710 byte[] signatureBuffer = new byte[0];
711 int sbp = 0;
712 /** Convert class signature to type, where signature is implicit.
713 */
714 Type classSigToType() {
715 if (signature[sigp] != 'L')
716 throw badClassFile("bad.class.signature",
717 Convert.utf2string(signature, sigp, 10));
718 sigp++;
719 Type outer = Type.noType;
720 int startSbp = sbp;
722 while (true) {
723 final byte c = signature[sigp++];
724 switch (c) {
726 case ';': { // end
727 ClassSymbol t = enterClass(names.fromUtf(signatureBuffer,
728 startSbp,
729 sbp - startSbp));
731 try {
732 return (outer == Type.noType) ?
733 t.erasure(types) :
734 new ClassType(outer, List.<Type>nil(), t);
735 } finally {
736 sbp = startSbp;
737 }
738 }
740 case '<': // generic arguments
741 ClassSymbol t = enterClass(names.fromUtf(signatureBuffer,
742 startSbp,
743 sbp - startSbp));
744 outer = new ClassType(outer, sigToTypes('>'), t) {
745 boolean completed = false;
746 @Override
747 public Type getEnclosingType() {
748 if (!completed) {
749 completed = true;
750 tsym.complete();
751 Type enclosingType = tsym.type.getEnclosingType();
752 if (enclosingType != Type.noType) {
753 List<Type> typeArgs =
754 super.getEnclosingType().allparams();
755 List<Type> typeParams =
756 enclosingType.allparams();
757 if (typeParams.length() != typeArgs.length()) {
758 // no "rare" types
759 super.setEnclosingType(types.erasure(enclosingType));
760 } else {
761 super.setEnclosingType(types.subst(enclosingType,
762 typeParams,
763 typeArgs));
764 }
765 } else {
766 super.setEnclosingType(Type.noType);
767 }
768 }
769 return super.getEnclosingType();
770 }
771 @Override
772 public void setEnclosingType(Type outer) {
773 throw new UnsupportedOperationException();
774 }
775 };
776 switch (signature[sigp++]) {
777 case ';':
778 if (sigp < signature.length && signature[sigp] == '.') {
779 // support old-style GJC signatures
780 // The signature produced was
781 // Lfoo/Outer<Lfoo/X;>;.Lfoo/Outer$Inner<Lfoo/Y;>;
782 // rather than say
783 // Lfoo/Outer<Lfoo/X;>.Inner<Lfoo/Y;>;
784 // so we skip past ".Lfoo/Outer$"
785 sigp += (sbp - startSbp) + // "foo/Outer"
786 3; // ".L" and "$"
787 signatureBuffer[sbp++] = (byte)'$';
788 break;
789 } else {
790 sbp = startSbp;
791 return outer;
792 }
793 case '.':
794 signatureBuffer[sbp++] = (byte)'$';
795 break;
796 default:
797 throw new AssertionError(signature[sigp-1]);
798 }
799 continue;
801 case '.':
802 //we have seen an enclosing non-generic class
803 if (outer != Type.noType) {
804 t = enterClass(names.fromUtf(signatureBuffer,
805 startSbp,
806 sbp - startSbp));
807 outer = new ClassType(outer, List.<Type>nil(), t);
808 }
809 signatureBuffer[sbp++] = (byte)'$';
810 continue;
811 case '/':
812 signatureBuffer[sbp++] = (byte)'.';
813 continue;
814 default:
815 signatureBuffer[sbp++] = c;
816 continue;
817 }
818 }
819 }
821 /** Convert (implicit) signature to list of types
822 * until `terminator' is encountered.
823 */
824 List<Type> sigToTypes(char terminator) {
825 List<Type> head = List.of(null);
826 List<Type> tail = head;
827 while (signature[sigp] != terminator)
828 tail = tail.setTail(List.of(sigToType()));
829 sigp++;
830 return head.tail;
831 }
833 /** Convert signature to type parameters, where signature is a byte
834 * array segment.
835 */
836 List<Type> sigToTypeParams(byte[] sig, int offset, int len) {
837 signature = sig;
838 sigp = offset;
839 siglimit = offset + len;
840 return sigToTypeParams();
841 }
843 /** Convert signature to type parameters, where signature is implicit.
844 */
845 List<Type> sigToTypeParams() {
846 List<Type> tvars = List.nil();
847 if (signature[sigp] == '<') {
848 sigp++;
849 int start = sigp;
850 sigEnterPhase = true;
851 while (signature[sigp] != '>')
852 tvars = tvars.prepend(sigToTypeParam());
853 sigEnterPhase = false;
854 sigp = start;
855 while (signature[sigp] != '>')
856 sigToTypeParam();
857 sigp++;
858 }
859 return tvars.reverse();
860 }
862 /** Convert (implicit) signature to type parameter.
863 */
864 Type sigToTypeParam() {
865 int start = sigp;
866 while (signature[sigp] != ':') sigp++;
867 Name name = names.fromUtf(signature, start, sigp - start);
868 TypeVar tvar;
869 if (sigEnterPhase) {
870 tvar = new TypeVar(name, currentOwner, syms.botType);
871 typevars.enter(tvar.tsym);
872 } else {
873 tvar = (TypeVar)findTypeVar(name);
874 }
875 List<Type> bounds = List.nil();
876 boolean allInterfaces = false;
877 if (signature[sigp] == ':' && signature[sigp+1] == ':') {
878 sigp++;
879 allInterfaces = true;
880 }
881 while (signature[sigp] == ':') {
882 sigp++;
883 bounds = bounds.prepend(sigToType());
884 }
885 if (!sigEnterPhase) {
886 types.setBounds(tvar, bounds.reverse(), allInterfaces);
887 }
888 return tvar;
889 }
891 /** Find type variable with given name in `typevars' scope.
892 */
893 Type findTypeVar(Name name) {
894 Scope.Entry e = typevars.lookup(name);
895 if (e.scope != null) {
896 return e.sym.type;
897 } else {
898 if (readingClassAttr) {
899 // While reading the class attribute, the supertypes
900 // might refer to a type variable from an enclosing element
901 // (method or class).
902 // If the type variable is defined in the enclosing class,
903 // we can actually find it in
904 // currentOwner.owner.type.getTypeArguments()
905 // However, until we have read the enclosing method attribute
906 // we don't know for sure if this owner is correct. It could
907 // be a method and there is no way to tell before reading the
908 // enclosing method attribute.
909 TypeVar t = new TypeVar(name, currentOwner, syms.botType);
910 missingTypeVariables = missingTypeVariables.prepend(t);
911 // System.err.println("Missing type var " + name);
912 return t;
913 }
914 throw badClassFile("undecl.type.var", name);
915 }
916 }
918 /************************************************************************
919 * Reading Attributes
920 ***********************************************************************/
922 protected enum AttributeKind { CLASS, MEMBER };
923 protected abstract class AttributeReader {
924 protected AttributeReader(Name name, ClassFile.Version version, Set<AttributeKind> kinds) {
925 this.name = name;
926 this.version = version;
927 this.kinds = kinds;
928 }
930 protected boolean accepts(AttributeKind kind) {
931 if (kinds.contains(kind)) {
932 if (majorVersion > version.major || (majorVersion == version.major && minorVersion >= version.minor))
933 return true;
935 if (lintClassfile && !warnedAttrs.contains(name)) {
936 JavaFileObject prev = log.useSource(currentClassFile);
937 try {
938 log.warning(LintCategory.CLASSFILE, (DiagnosticPosition) null, "future.attr",
939 name, version.major, version.minor, majorVersion, minorVersion);
940 } finally {
941 log.useSource(prev);
942 }
943 warnedAttrs.add(name);
944 }
945 }
946 return false;
947 }
949 protected abstract void read(Symbol sym, int attrLen);
951 protected final Name name;
952 protected final ClassFile.Version version;
953 protected final Set<AttributeKind> kinds;
954 }
956 protected Set<AttributeKind> CLASS_ATTRIBUTE =
957 EnumSet.of(AttributeKind.CLASS);
958 protected Set<AttributeKind> MEMBER_ATTRIBUTE =
959 EnumSet.of(AttributeKind.MEMBER);
960 protected Set<AttributeKind> CLASS_OR_MEMBER_ATTRIBUTE =
961 EnumSet.of(AttributeKind.CLASS, AttributeKind.MEMBER);
963 protected Map<Name, AttributeReader> attributeReaders = new HashMap<Name, AttributeReader>();
965 private void initAttributeReaders() {
966 AttributeReader[] readers = {
967 // v45.3 attributes
969 new AttributeReader(names.Code, V45_3, MEMBER_ATTRIBUTE) {
970 protected void read(Symbol sym, int attrLen) {
971 if (readAllOfClassFile || saveParameterNames)
972 ((MethodSymbol)sym).code = readCode(sym);
973 else
974 bp = bp + attrLen;
975 }
976 },
978 new AttributeReader(names.ConstantValue, V45_3, MEMBER_ATTRIBUTE) {
979 protected void read(Symbol sym, int attrLen) {
980 Object v = readPool(nextChar());
981 // Ignore ConstantValue attribute if field not final.
982 if ((sym.flags() & FINAL) != 0)
983 ((VarSymbol) sym).setData(v);
984 }
985 },
987 new AttributeReader(names.Deprecated, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) {
988 protected void read(Symbol sym, int attrLen) {
989 sym.flags_field |= DEPRECATED;
990 }
991 },
993 new AttributeReader(names.Exceptions, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) {
994 protected void read(Symbol sym, int attrLen) {
995 int nexceptions = nextChar();
996 List<Type> thrown = List.nil();
997 for (int j = 0; j < nexceptions; j++)
998 thrown = thrown.prepend(readClassSymbol(nextChar()).type);
999 if (sym.type.getThrownTypes().isEmpty())
1000 sym.type.asMethodType().thrown = thrown.reverse();
1001 }
1002 },
1004 new AttributeReader(names.InnerClasses, V45_3, CLASS_ATTRIBUTE) {
1005 protected void read(Symbol sym, int attrLen) {
1006 ClassSymbol c = (ClassSymbol) sym;
1007 readInnerClasses(c);
1008 }
1009 },
1011 new AttributeReader(names.LocalVariableTable, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) {
1012 protected void read(Symbol sym, int attrLen) {
1013 int newbp = bp + attrLen;
1014 if (saveParameterNames && !sawMethodParameters) {
1015 // Pick up parameter names from the variable table.
1016 // Parameter names are not explicitly identified as such,
1017 // but all parameter name entries in the LocalVariableTable
1018 // have a start_pc of 0. Therefore, we record the name
1019 // indicies of all slots with a start_pc of zero in the
1020 // parameterNameIndicies array.
1021 // Note that this implicitly honors the JVMS spec that
1022 // there may be more than one LocalVariableTable, and that
1023 // there is no specified ordering for the entries.
1024 int numEntries = nextChar();
1025 for (int i = 0; i < numEntries; i++) {
1026 int start_pc = nextChar();
1027 int length = nextChar();
1028 int nameIndex = nextChar();
1029 int sigIndex = nextChar();
1030 int register = nextChar();
1031 if (start_pc == 0) {
1032 // ensure array large enough
1033 if (register >= parameterNameIndices.length) {
1034 int newSize = Math.max(register, parameterNameIndices.length + 8);
1035 parameterNameIndices =
1036 Arrays.copyOf(parameterNameIndices, newSize);
1037 }
1038 parameterNameIndices[register] = nameIndex;
1039 haveParameterNameIndices = true;
1040 }
1041 }
1042 }
1043 bp = newbp;
1044 }
1045 },
1047 new AttributeReader(names.MethodParameters, V52, MEMBER_ATTRIBUTE) {
1048 protected void read(Symbol sym, int attrlen) {
1049 int newbp = bp + attrlen;
1050 if (saveParameterNames) {
1051 sawMethodParameters = true;
1052 int numEntries = nextByte();
1053 parameterNameIndices = new int[numEntries];
1054 haveParameterNameIndices = true;
1055 for (int i = 0; i < numEntries; i++) {
1056 int nameIndex = nextChar();
1057 int flags = nextChar();
1058 parameterNameIndices[i] = nameIndex;
1059 }
1060 }
1061 bp = newbp;
1062 }
1063 },
1066 new AttributeReader(names.SourceFile, V45_3, CLASS_ATTRIBUTE) {
1067 protected void read(Symbol sym, int attrLen) {
1068 ClassSymbol c = (ClassSymbol) sym;
1069 Name n = readName(nextChar());
1070 c.sourcefile = new SourceFileObject(n, c.flatname);
1071 // If the class is a toplevel class, originating from a Java source file,
1072 // but the class name does not match the file name, then it is
1073 // an auxiliary class.
1074 String sn = n.toString();
1075 if (c.owner.kind == Kinds.PCK &&
1076 sn.endsWith(".java") &&
1077 !sn.equals(c.name.toString()+".java")) {
1078 c.flags_field |= AUXILIARY;
1079 }
1080 }
1081 },
1083 new AttributeReader(names.Synthetic, V45_3, CLASS_OR_MEMBER_ATTRIBUTE) {
1084 protected void read(Symbol sym, int attrLen) {
1085 // bridge methods are visible when generics not enabled
1086 if (allowGenerics || (sym.flags_field & BRIDGE) == 0)
1087 sym.flags_field |= SYNTHETIC;
1088 }
1089 },
1091 // standard v49 attributes
1093 new AttributeReader(names.EnclosingMethod, V49, CLASS_ATTRIBUTE) {
1094 protected void read(Symbol sym, int attrLen) {
1095 int newbp = bp + attrLen;
1096 readEnclosingMethodAttr(sym);
1097 bp = newbp;
1098 }
1099 },
1101 new AttributeReader(names.Signature, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1102 @Override
1103 protected boolean accepts(AttributeKind kind) {
1104 return super.accepts(kind) && allowGenerics;
1105 }
1107 protected void read(Symbol sym, int attrLen) {
1108 if (sym.kind == TYP) {
1109 ClassSymbol c = (ClassSymbol) sym;
1110 readingClassAttr = true;
1111 try {
1112 ClassType ct1 = (ClassType)c.type;
1113 Assert.check(c == currentOwner);
1114 ct1.typarams_field = readTypeParams(nextChar());
1115 ct1.supertype_field = sigToType();
1116 ListBuffer<Type> is = new ListBuffer<Type>();
1117 while (sigp != siglimit) is.append(sigToType());
1118 ct1.interfaces_field = is.toList();
1119 } finally {
1120 readingClassAttr = false;
1121 }
1122 } else {
1123 List<Type> thrown = sym.type.getThrownTypes();
1124 sym.type = readType(nextChar());
1125 //- System.err.println(" # " + sym.type);
1126 if (sym.kind == MTH && sym.type.getThrownTypes().isEmpty())
1127 sym.type.asMethodType().thrown = thrown;
1129 }
1130 }
1131 },
1133 // v49 annotation attributes
1135 new AttributeReader(names.AnnotationDefault, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1136 protected void read(Symbol sym, int attrLen) {
1137 attachAnnotationDefault(sym);
1138 }
1139 },
1141 new AttributeReader(names.RuntimeInvisibleAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1142 protected void read(Symbol sym, int attrLen) {
1143 attachAnnotations(sym);
1144 }
1145 },
1147 new AttributeReader(names.RuntimeInvisibleParameterAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1148 protected void read(Symbol sym, int attrLen) {
1149 attachParameterAnnotations(sym);
1150 }
1151 },
1153 new AttributeReader(names.RuntimeVisibleAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1154 protected void read(Symbol sym, int attrLen) {
1155 attachAnnotations(sym);
1156 }
1157 },
1159 new AttributeReader(names.RuntimeVisibleParameterAnnotations, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1160 protected void read(Symbol sym, int attrLen) {
1161 attachParameterAnnotations(sym);
1162 }
1163 },
1165 // additional "legacy" v49 attributes, superceded by flags
1167 new AttributeReader(names.Annotation, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1168 protected void read(Symbol sym, int attrLen) {
1169 if (allowAnnotations)
1170 sym.flags_field |= ANNOTATION;
1171 }
1172 },
1174 new AttributeReader(names.Bridge, V49, MEMBER_ATTRIBUTE) {
1175 protected void read(Symbol sym, int attrLen) {
1176 sym.flags_field |= BRIDGE;
1177 if (!allowGenerics)
1178 sym.flags_field &= ~SYNTHETIC;
1179 }
1180 },
1182 new AttributeReader(names.Enum, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1183 protected void read(Symbol sym, int attrLen) {
1184 sym.flags_field |= ENUM;
1185 }
1186 },
1188 new AttributeReader(names.Varargs, V49, CLASS_OR_MEMBER_ATTRIBUTE) {
1189 protected void read(Symbol sym, int attrLen) {
1190 if (allowVarargs)
1191 sym.flags_field |= VARARGS;
1192 }
1193 },
1195 new AttributeReader(names.RuntimeVisibleTypeAnnotations, V52, CLASS_OR_MEMBER_ATTRIBUTE) {
1196 protected void read(Symbol sym, int attrLen) {
1197 attachTypeAnnotations(sym);
1198 }
1199 },
1201 new AttributeReader(names.RuntimeInvisibleTypeAnnotations, V52, CLASS_OR_MEMBER_ATTRIBUTE) {
1202 protected void read(Symbol sym, int attrLen) {
1203 attachTypeAnnotations(sym);
1204 }
1205 },
1208 // The following attributes for a Code attribute are not currently handled
1209 // StackMapTable
1210 // SourceDebugExtension
1211 // LineNumberTable
1212 // LocalVariableTypeTable
1213 };
1215 for (AttributeReader r: readers)
1216 attributeReaders.put(r.name, r);
1217 }
1219 /** Report unrecognized attribute.
1220 */
1221 void unrecognized(Name attrName) {
1222 if (checkClassFile)
1223 printCCF("ccf.unrecognized.attribute", attrName);
1224 }
1228 protected void readEnclosingMethodAttr(Symbol sym) {
1229 // sym is a nested class with an "Enclosing Method" attribute
1230 // remove sym from it's current owners scope and place it in
1231 // the scope specified by the attribute
1232 sym.owner.members().remove(sym);
1233 ClassSymbol self = (ClassSymbol)sym;
1234 ClassSymbol c = readClassSymbol(nextChar());
1235 NameAndType nt = (NameAndType)readPool(nextChar());
1237 if (c.members_field == null)
1238 throw badClassFile("bad.enclosing.class", self, c);
1240 MethodSymbol m = findMethod(nt, c.members_field, self.flags());
1241 if (nt != null && m == null)
1242 throw badClassFile("bad.enclosing.method", self);
1244 self.name = simpleBinaryName(self.flatname, c.flatname) ;
1245 self.owner = m != null ? m : c;
1246 if (self.name.isEmpty())
1247 self.fullname = names.empty;
1248 else
1249 self.fullname = ClassSymbol.formFullName(self.name, self.owner);
1251 if (m != null) {
1252 ((ClassType)sym.type).setEnclosingType(m.type);
1253 } else if ((self.flags_field & STATIC) == 0) {
1254 ((ClassType)sym.type).setEnclosingType(c.type);
1255 } else {
1256 ((ClassType)sym.type).setEnclosingType(Type.noType);
1257 }
1258 enterTypevars(self);
1259 if (!missingTypeVariables.isEmpty()) {
1260 ListBuffer<Type> typeVars = new ListBuffer<Type>();
1261 for (Type typevar : missingTypeVariables) {
1262 typeVars.append(findTypeVar(typevar.tsym.name));
1263 }
1264 foundTypeVariables = typeVars.toList();
1265 } else {
1266 foundTypeVariables = List.nil();
1267 }
1268 }
1270 // See java.lang.Class
1271 private Name simpleBinaryName(Name self, Name enclosing) {
1272 String simpleBinaryName = self.toString().substring(enclosing.toString().length());
1273 if (simpleBinaryName.length() < 1 || simpleBinaryName.charAt(0) != '$')
1274 throw badClassFile("bad.enclosing.method", self);
1275 int index = 1;
1276 while (index < simpleBinaryName.length() &&
1277 isAsciiDigit(simpleBinaryName.charAt(index)))
1278 index++;
1279 return names.fromString(simpleBinaryName.substring(index));
1280 }
1282 private MethodSymbol findMethod(NameAndType nt, Scope scope, long flags) {
1283 if (nt == null)
1284 return null;
1286 MethodType type = nt.uniqueType.type.asMethodType();
1288 for (Scope.Entry e = scope.lookup(nt.name); e.scope != null; e = e.next())
1289 if (e.sym.kind == MTH && isSameBinaryType(e.sym.type.asMethodType(), type))
1290 return (MethodSymbol)e.sym;
1292 if (nt.name != names.init)
1293 // not a constructor
1294 return null;
1295 if ((flags & INTERFACE) != 0)
1296 // no enclosing instance
1297 return null;
1298 if (nt.uniqueType.type.getParameterTypes().isEmpty())
1299 // no parameters
1300 return null;
1302 // A constructor of an inner class.
1303 // Remove the first argument (the enclosing instance)
1304 nt.setType(new MethodType(nt.uniqueType.type.getParameterTypes().tail,
1305 nt.uniqueType.type.getReturnType(),
1306 nt.uniqueType.type.getThrownTypes(),
1307 syms.methodClass));
1308 // Try searching again
1309 return findMethod(nt, scope, flags);
1310 }
1312 /** Similar to Types.isSameType but avoids completion */
1313 private boolean isSameBinaryType(MethodType mt1, MethodType mt2) {
1314 List<Type> types1 = types.erasure(mt1.getParameterTypes())
1315 .prepend(types.erasure(mt1.getReturnType()));
1316 List<Type> types2 = mt2.getParameterTypes().prepend(mt2.getReturnType());
1317 while (!types1.isEmpty() && !types2.isEmpty()) {
1318 if (types1.head.tsym != types2.head.tsym)
1319 return false;
1320 types1 = types1.tail;
1321 types2 = types2.tail;
1322 }
1323 return types1.isEmpty() && types2.isEmpty();
1324 }
1326 /**
1327 * Character.isDigit answers <tt>true</tt> to some non-ascii
1328 * digits. This one does not. <b>copied from java.lang.Class</b>
1329 */
1330 private static boolean isAsciiDigit(char c) {
1331 return '0' <= c && c <= '9';
1332 }
1334 /** Read member attributes.
1335 */
1336 void readMemberAttrs(Symbol sym) {
1337 readAttrs(sym, AttributeKind.MEMBER);
1338 }
1340 void readAttrs(Symbol sym, AttributeKind kind) {
1341 char ac = nextChar();
1342 for (int i = 0; i < ac; i++) {
1343 Name attrName = readName(nextChar());
1344 int attrLen = nextInt();
1345 AttributeReader r = attributeReaders.get(attrName);
1346 if (r != null && r.accepts(kind))
1347 r.read(sym, attrLen);
1348 else {
1349 unrecognized(attrName);
1350 bp = bp + attrLen;
1351 }
1352 }
1353 }
1355 private boolean readingClassAttr = false;
1356 private List<Type> missingTypeVariables = List.nil();
1357 private List<Type> foundTypeVariables = List.nil();
1359 /** Read class attributes.
1360 */
1361 void readClassAttrs(ClassSymbol c) {
1362 readAttrs(c, AttributeKind.CLASS);
1363 }
1365 /** Read code block.
1366 */
1367 Code readCode(Symbol owner) {
1368 nextChar(); // max_stack
1369 nextChar(); // max_locals
1370 final int code_length = nextInt();
1371 bp += code_length;
1372 final char exception_table_length = nextChar();
1373 bp += exception_table_length * 8;
1374 readMemberAttrs(owner);
1375 return null;
1376 }
1378 /************************************************************************
1379 * Reading Java-language annotations
1380 ***********************************************************************/
1382 /** Attach annotations.
1383 */
1384 void attachAnnotations(final Symbol sym) {
1385 int numAttributes = nextChar();
1386 if (numAttributes != 0) {
1387 ListBuffer<CompoundAnnotationProxy> proxies =
1388 new ListBuffer<CompoundAnnotationProxy>();
1389 for (int i = 0; i<numAttributes; i++) {
1390 CompoundAnnotationProxy proxy = readCompoundAnnotation();
1391 if (proxy.type.tsym == syms.proprietaryType.tsym)
1392 sym.flags_field |= PROPRIETARY;
1393 else if (proxy.type.tsym == syms.profileType.tsym) {
1394 if (profile != Profile.DEFAULT) {
1395 for (Pair<Name,Attribute> v: proxy.values) {
1396 if (v.fst == names.value && v.snd instanceof Attribute.Constant) {
1397 Attribute.Constant c = (Attribute.Constant) v.snd;
1398 if (c.type == syms.intType && ((Integer) c.value) > profile.value) {
1399 sym.flags_field |= NOT_IN_PROFILE;
1400 }
1401 }
1402 }
1403 }
1404 } else
1405 proxies.append(proxy);
1406 }
1407 annotate.normal(new AnnotationCompleter(sym, proxies.toList()));
1408 }
1409 }
1411 /** Attach parameter annotations.
1412 */
1413 void attachParameterAnnotations(final Symbol method) {
1414 final MethodSymbol meth = (MethodSymbol)method;
1415 int numParameters = buf[bp++] & 0xFF;
1416 List<VarSymbol> parameters = meth.params();
1417 int pnum = 0;
1418 while (parameters.tail != null) {
1419 attachAnnotations(parameters.head);
1420 parameters = parameters.tail;
1421 pnum++;
1422 }
1423 if (pnum != numParameters) {
1424 throw badClassFile("bad.runtime.invisible.param.annotations", meth);
1425 }
1426 }
1428 void attachTypeAnnotations(final Symbol sym) {
1429 int numAttributes = nextChar();
1430 if (numAttributes != 0) {
1431 ListBuffer<TypeAnnotationProxy> proxies =
1432 ListBuffer.lb();
1433 for (int i = 0; i < numAttributes; i++)
1434 proxies.append(readTypeAnnotation());
1435 annotate.normal(new TypeAnnotationCompleter(sym, proxies.toList()));
1436 }
1437 }
1439 /** Attach the default value for an annotation element.
1440 */
1441 void attachAnnotationDefault(final Symbol sym) {
1442 final MethodSymbol meth = (MethodSymbol)sym; // only on methods
1443 final Attribute value = readAttributeValue();
1445 // The default value is set later during annotation. It might
1446 // be the case that the Symbol sym is annotated _after_ the
1447 // repeating instances that depend on this default value,
1448 // because of this we set an interim value that tells us this
1449 // element (most likely) has a default.
1450 //
1451 // Set interim value for now, reset just before we do this
1452 // properly at annotate time.
1453 meth.defaultValue = value;
1454 annotate.normal(new AnnotationDefaultCompleter(meth, value));
1455 }
1457 Type readTypeOrClassSymbol(int i) {
1458 // support preliminary jsr175-format class files
1459 if (buf[poolIdx[i]] == CONSTANT_Class)
1460 return readClassSymbol(i).type;
1461 return readType(i);
1462 }
1463 Type readEnumType(int i) {
1464 // support preliminary jsr175-format class files
1465 int index = poolIdx[i];
1466 int length = getChar(index + 1);
1467 if (buf[index + length + 2] != ';')
1468 return enterClass(readName(i)).type;
1469 return readType(i);
1470 }
1472 CompoundAnnotationProxy readCompoundAnnotation() {
1473 Type t = readTypeOrClassSymbol(nextChar());
1474 int numFields = nextChar();
1475 ListBuffer<Pair<Name,Attribute>> pairs =
1476 new ListBuffer<Pair<Name,Attribute>>();
1477 for (int i=0; i<numFields; i++) {
1478 Name name = readName(nextChar());
1479 Attribute value = readAttributeValue();
1480 pairs.append(new Pair<Name,Attribute>(name, value));
1481 }
1482 return new CompoundAnnotationProxy(t, pairs.toList());
1483 }
1485 TypeAnnotationProxy readTypeAnnotation() {
1486 TypeAnnotationPosition position = readPosition();
1487 CompoundAnnotationProxy proxy = readCompoundAnnotation();
1489 return new TypeAnnotationProxy(proxy, position);
1490 }
1492 TypeAnnotationPosition readPosition() {
1493 int tag = nextByte(); // TargetType tag is a byte
1495 if (!TargetType.isValidTargetTypeValue(tag))
1496 throw this.badClassFile("bad.type.annotation.value", String.format("0x%02X", tag));
1498 TypeAnnotationPosition position = new TypeAnnotationPosition();
1499 TargetType type = TargetType.fromTargetTypeValue(tag);
1501 position.type = type;
1503 switch (type) {
1504 // instanceof
1505 case INSTANCEOF:
1506 // new expression
1507 case NEW:
1508 // constructor/method reference receiver
1509 case CONSTRUCTOR_REFERENCE:
1510 case METHOD_REFERENCE:
1511 position.offset = nextChar();
1512 break;
1513 // local variable
1514 case LOCAL_VARIABLE:
1515 // resource variable
1516 case RESOURCE_VARIABLE:
1517 int table_length = nextChar();
1518 position.lvarOffset = new int[table_length];
1519 position.lvarLength = new int[table_length];
1520 position.lvarIndex = new int[table_length];
1522 for (int i = 0; i < table_length; ++i) {
1523 position.lvarOffset[i] = nextChar();
1524 position.lvarLength[i] = nextChar();
1525 position.lvarIndex[i] = nextChar();
1526 }
1527 break;
1528 // exception parameter
1529 case EXCEPTION_PARAMETER:
1530 position.exception_index = nextChar();
1531 break;
1532 // method receiver
1533 case METHOD_RECEIVER:
1534 // Do nothing
1535 break;
1536 // type parameter
1537 case CLASS_TYPE_PARAMETER:
1538 case METHOD_TYPE_PARAMETER:
1539 position.parameter_index = nextByte();
1540 break;
1541 // type parameter bound
1542 case CLASS_TYPE_PARAMETER_BOUND:
1543 case METHOD_TYPE_PARAMETER_BOUND:
1544 position.parameter_index = nextByte();
1545 position.bound_index = nextByte();
1546 break;
1547 // class extends or implements clause
1548 case CLASS_EXTENDS:
1549 position.type_index = nextChar();
1550 break;
1551 // throws
1552 case THROWS:
1553 position.type_index = nextChar();
1554 break;
1555 // method parameter
1556 case METHOD_FORMAL_PARAMETER:
1557 position.parameter_index = nextByte();
1558 break;
1559 // type cast
1560 case CAST:
1561 // method/constructor/reference type argument
1562 case CONSTRUCTOR_INVOCATION_TYPE_ARGUMENT:
1563 case METHOD_INVOCATION_TYPE_ARGUMENT:
1564 case CONSTRUCTOR_REFERENCE_TYPE_ARGUMENT:
1565 case METHOD_REFERENCE_TYPE_ARGUMENT:
1566 position.offset = nextChar();
1567 position.type_index = nextByte();
1568 break;
1569 // We don't need to worry about these
1570 case METHOD_RETURN:
1571 case FIELD:
1572 break;
1573 case UNKNOWN:
1574 throw new AssertionError("jvm.ClassReader: UNKNOWN target type should never occur!");
1575 default:
1576 throw new AssertionError("jvm.ClassReader: Unknown target type for position: " + position);
1577 }
1579 { // See whether there is location info and read it
1580 int len = nextByte();
1581 ListBuffer<Integer> loc = ListBuffer.lb();
1582 for (int i = 0; i < len * TypeAnnotationPosition.TypePathEntry.bytesPerEntry; ++i)
1583 loc = loc.append(nextByte());
1584 position.location = TypeAnnotationPosition.getTypePathFromBinary(loc.toList());
1585 }
1587 return position;
1588 }
1590 Attribute readAttributeValue() {
1591 char c = (char) buf[bp++];
1592 switch (c) {
1593 case 'B':
1594 return new Attribute.Constant(syms.byteType, readPool(nextChar()));
1595 case 'C':
1596 return new Attribute.Constant(syms.charType, readPool(nextChar()));
1597 case 'D':
1598 return new Attribute.Constant(syms.doubleType, readPool(nextChar()));
1599 case 'F':
1600 return new Attribute.Constant(syms.floatType, readPool(nextChar()));
1601 case 'I':
1602 return new Attribute.Constant(syms.intType, readPool(nextChar()));
1603 case 'J':
1604 return new Attribute.Constant(syms.longType, readPool(nextChar()));
1605 case 'S':
1606 return new Attribute.Constant(syms.shortType, readPool(nextChar()));
1607 case 'Z':
1608 return new Attribute.Constant(syms.booleanType, readPool(nextChar()));
1609 case 's':
1610 return new Attribute.Constant(syms.stringType, readPool(nextChar()).toString());
1611 case 'e':
1612 return new EnumAttributeProxy(readEnumType(nextChar()), readName(nextChar()));
1613 case 'c':
1614 return new Attribute.Class(types, readTypeOrClassSymbol(nextChar()));
1615 case '[': {
1616 int n = nextChar();
1617 ListBuffer<Attribute> l = new ListBuffer<Attribute>();
1618 for (int i=0; i<n; i++)
1619 l.append(readAttributeValue());
1620 return new ArrayAttributeProxy(l.toList());
1621 }
1622 case '@':
1623 return readCompoundAnnotation();
1624 default:
1625 throw new AssertionError("unknown annotation tag '" + c + "'");
1626 }
1627 }
1629 interface ProxyVisitor extends Attribute.Visitor {
1630 void visitEnumAttributeProxy(EnumAttributeProxy proxy);
1631 void visitArrayAttributeProxy(ArrayAttributeProxy proxy);
1632 void visitCompoundAnnotationProxy(CompoundAnnotationProxy proxy);
1633 }
1635 static class EnumAttributeProxy extends Attribute {
1636 Type enumType;
1637 Name enumerator;
1638 public EnumAttributeProxy(Type enumType, Name enumerator) {
1639 super(null);
1640 this.enumType = enumType;
1641 this.enumerator = enumerator;
1642 }
1643 public void accept(Visitor v) { ((ProxyVisitor)v).visitEnumAttributeProxy(this); }
1644 @Override
1645 public String toString() {
1646 return "/*proxy enum*/" + enumType + "." + enumerator;
1647 }
1648 }
1650 static class ArrayAttributeProxy extends Attribute {
1651 List<Attribute> values;
1652 ArrayAttributeProxy(List<Attribute> values) {
1653 super(null);
1654 this.values = values;
1655 }
1656 public void accept(Visitor v) { ((ProxyVisitor)v).visitArrayAttributeProxy(this); }
1657 @Override
1658 public String toString() {
1659 return "{" + values + "}";
1660 }
1661 }
1663 /** A temporary proxy representing a compound attribute.
1664 */
1665 static class CompoundAnnotationProxy extends Attribute {
1666 final List<Pair<Name,Attribute>> values;
1667 public CompoundAnnotationProxy(Type type,
1668 List<Pair<Name,Attribute>> values) {
1669 super(type);
1670 this.values = values;
1671 }
1672 public void accept(Visitor v) { ((ProxyVisitor)v).visitCompoundAnnotationProxy(this); }
1673 @Override
1674 public String toString() {
1675 StringBuilder buf = new StringBuilder();
1676 buf.append("@");
1677 buf.append(type.tsym.getQualifiedName());
1678 buf.append("/*proxy*/{");
1679 boolean first = true;
1680 for (List<Pair<Name,Attribute>> v = values;
1681 v.nonEmpty(); v = v.tail) {
1682 Pair<Name,Attribute> value = v.head;
1683 if (!first) buf.append(",");
1684 first = false;
1685 buf.append(value.fst);
1686 buf.append("=");
1687 buf.append(value.snd);
1688 }
1689 buf.append("}");
1690 return buf.toString();
1691 }
1692 }
1694 /** A temporary proxy representing a type annotation.
1695 */
1696 static class TypeAnnotationProxy {
1697 final CompoundAnnotationProxy compound;
1698 final TypeAnnotationPosition position;
1699 public TypeAnnotationProxy(CompoundAnnotationProxy compound,
1700 TypeAnnotationPosition position) {
1701 this.compound = compound;
1702 this.position = position;
1703 }
1704 }
1706 class AnnotationDeproxy implements ProxyVisitor {
1707 private ClassSymbol requestingOwner = currentOwner.kind == MTH
1708 ? currentOwner.enclClass() : (ClassSymbol)currentOwner;
1710 List<Attribute.Compound> deproxyCompoundList(List<CompoundAnnotationProxy> pl) {
1711 // also must fill in types!!!!
1712 ListBuffer<Attribute.Compound> buf =
1713 new ListBuffer<Attribute.Compound>();
1714 for (List<CompoundAnnotationProxy> l = pl; l.nonEmpty(); l=l.tail) {
1715 buf.append(deproxyCompound(l.head));
1716 }
1717 return buf.toList();
1718 }
1720 Attribute.Compound deproxyCompound(CompoundAnnotationProxy a) {
1721 ListBuffer<Pair<Symbol.MethodSymbol,Attribute>> buf =
1722 new ListBuffer<Pair<Symbol.MethodSymbol,Attribute>>();
1723 for (List<Pair<Name,Attribute>> l = a.values;
1724 l.nonEmpty();
1725 l = l.tail) {
1726 MethodSymbol meth = findAccessMethod(a.type, l.head.fst);
1727 buf.append(new Pair<Symbol.MethodSymbol,Attribute>
1728 (meth, deproxy(meth.type.getReturnType(), l.head.snd)));
1729 }
1730 return new Attribute.Compound(a.type, buf.toList());
1731 }
1733 MethodSymbol findAccessMethod(Type container, Name name) {
1734 CompletionFailure failure = null;
1735 try {
1736 for (Scope.Entry e = container.tsym.members().lookup(name);
1737 e.scope != null;
1738 e = e.next()) {
1739 Symbol sym = e.sym;
1740 if (sym.kind == MTH && sym.type.getParameterTypes().length() == 0)
1741 return (MethodSymbol) sym;
1742 }
1743 } catch (CompletionFailure ex) {
1744 failure = ex;
1745 }
1746 // The method wasn't found: emit a warning and recover
1747 JavaFileObject prevSource = log.useSource(requestingOwner.classfile);
1748 try {
1749 if (failure == null) {
1750 log.warning("annotation.method.not.found",
1751 container,
1752 name);
1753 } else {
1754 log.warning("annotation.method.not.found.reason",
1755 container,
1756 name,
1757 failure.getDetailValue());//diagnostic, if present
1758 }
1759 } finally {
1760 log.useSource(prevSource);
1761 }
1762 // Construct a new method type and symbol. Use bottom
1763 // type (typeof null) as return type because this type is
1764 // a subtype of all reference types and can be converted
1765 // to primitive types by unboxing.
1766 MethodType mt = new MethodType(List.<Type>nil(),
1767 syms.botType,
1768 List.<Type>nil(),
1769 syms.methodClass);
1770 return new MethodSymbol(PUBLIC | ABSTRACT, name, mt, container.tsym);
1771 }
1773 Attribute result;
1774 Type type;
1775 Attribute deproxy(Type t, Attribute a) {
1776 Type oldType = type;
1777 try {
1778 type = t;
1779 a.accept(this);
1780 return result;
1781 } finally {
1782 type = oldType;
1783 }
1784 }
1786 // implement Attribute.Visitor below
1788 public void visitConstant(Attribute.Constant value) {
1789 // assert value.type == type;
1790 result = value;
1791 }
1793 public void visitClass(Attribute.Class clazz) {
1794 result = clazz;
1795 }
1797 public void visitEnum(Attribute.Enum e) {
1798 throw new AssertionError(); // shouldn't happen
1799 }
1801 public void visitCompound(Attribute.Compound compound) {
1802 throw new AssertionError(); // shouldn't happen
1803 }
1805 public void visitArray(Attribute.Array array) {
1806 throw new AssertionError(); // shouldn't happen
1807 }
1809 public void visitError(Attribute.Error e) {
1810 throw new AssertionError(); // shouldn't happen
1811 }
1813 public void visitEnumAttributeProxy(EnumAttributeProxy proxy) {
1814 // type.tsym.flatName() should == proxy.enumFlatName
1815 TypeSymbol enumTypeSym = proxy.enumType.tsym;
1816 VarSymbol enumerator = null;
1817 CompletionFailure failure = null;
1818 try {
1819 for (Scope.Entry e = enumTypeSym.members().lookup(proxy.enumerator);
1820 e.scope != null;
1821 e = e.next()) {
1822 if (e.sym.kind == VAR) {
1823 enumerator = (VarSymbol)e.sym;
1824 break;
1825 }
1826 }
1827 }
1828 catch (CompletionFailure ex) {
1829 failure = ex;
1830 }
1831 if (enumerator == null) {
1832 if (failure != null) {
1833 log.warning("unknown.enum.constant.reason",
1834 currentClassFile, enumTypeSym, proxy.enumerator,
1835 failure.getDiagnostic());
1836 } else {
1837 log.warning("unknown.enum.constant",
1838 currentClassFile, enumTypeSym, proxy.enumerator);
1839 }
1840 result = new Attribute.Enum(enumTypeSym.type,
1841 new VarSymbol(0, proxy.enumerator, syms.botType, enumTypeSym));
1842 } else {
1843 result = new Attribute.Enum(enumTypeSym.type, enumerator);
1844 }
1845 }
1847 public void visitArrayAttributeProxy(ArrayAttributeProxy proxy) {
1848 int length = proxy.values.length();
1849 Attribute[] ats = new Attribute[length];
1850 Type elemtype = types.elemtype(type);
1851 int i = 0;
1852 for (List<Attribute> p = proxy.values; p.nonEmpty(); p = p.tail) {
1853 ats[i++] = deproxy(elemtype, p.head);
1854 }
1855 result = new Attribute.Array(type, ats);
1856 }
1858 public void visitCompoundAnnotationProxy(CompoundAnnotationProxy proxy) {
1859 result = deproxyCompound(proxy);
1860 }
1861 }
1863 class AnnotationDefaultCompleter extends AnnotationDeproxy implements Annotate.Annotator {
1864 final MethodSymbol sym;
1865 final Attribute value;
1866 final JavaFileObject classFile = currentClassFile;
1867 @Override
1868 public String toString() {
1869 return " ClassReader store default for " + sym.owner + "." + sym + " is " + value;
1870 }
1871 AnnotationDefaultCompleter(MethodSymbol sym, Attribute value) {
1872 this.sym = sym;
1873 this.value = value;
1874 }
1875 // implement Annotate.Annotator.enterAnnotation()
1876 public void enterAnnotation() {
1877 JavaFileObject previousClassFile = currentClassFile;
1878 try {
1879 // Reset the interim value set earlier in
1880 // attachAnnotationDefault().
1881 sym.defaultValue = null;
1882 currentClassFile = classFile;
1883 sym.defaultValue = deproxy(sym.type.getReturnType(), value);
1884 } finally {
1885 currentClassFile = previousClassFile;
1886 }
1887 }
1888 }
1890 class AnnotationCompleter extends AnnotationDeproxy implements Annotate.Annotator {
1891 final Symbol sym;
1892 final List<CompoundAnnotationProxy> l;
1893 final JavaFileObject classFile;
1894 @Override
1895 public String toString() {
1896 return " ClassReader annotate " + sym.owner + "." + sym + " with " + l;
1897 }
1898 AnnotationCompleter(Symbol sym, List<CompoundAnnotationProxy> l) {
1899 this.sym = sym;
1900 this.l = l;
1901 this.classFile = currentClassFile;
1902 }
1903 // implement Annotate.Annotator.enterAnnotation()
1904 public void enterAnnotation() {
1905 JavaFileObject previousClassFile = currentClassFile;
1906 try {
1907 currentClassFile = classFile;
1908 List<Attribute.Compound> newList = deproxyCompoundList(l);
1909 if (sym.annotationsPendingCompletion()) {
1910 sym.setDeclarationAttributes(newList);
1911 } else {
1912 sym.appendAttributes(newList);
1913 }
1914 } finally {
1915 currentClassFile = previousClassFile;
1916 }
1917 }
1918 }
1920 class TypeAnnotationCompleter extends AnnotationCompleter {
1922 List<TypeAnnotationProxy> proxies;
1924 TypeAnnotationCompleter(Symbol sym,
1925 List<TypeAnnotationProxy> proxies) {
1926 super(sym, List.<CompoundAnnotationProxy>nil());
1927 this.proxies = proxies;
1928 }
1930 List<Attribute.TypeCompound> deproxyTypeCompoundList(List<TypeAnnotationProxy> proxies) {
1931 ListBuffer<Attribute.TypeCompound> buf = ListBuffer.lb();
1932 for (TypeAnnotationProxy proxy: proxies) {
1933 Attribute.Compound compound = deproxyCompound(proxy.compound);
1934 Attribute.TypeCompound typeCompound = new Attribute.TypeCompound(compound, proxy.position);
1935 buf.add(typeCompound);
1936 }
1937 return buf.toList();
1938 }
1940 @Override
1941 public void enterAnnotation() {
1942 JavaFileObject previousClassFile = currentClassFile;
1943 try {
1944 currentClassFile = classFile;
1945 List<Attribute.TypeCompound> newList = deproxyTypeCompoundList(proxies);
1946 sym.setTypeAttributes(newList.prependList(sym.getRawTypeAttributes()));
1947 } finally {
1948 currentClassFile = previousClassFile;
1949 }
1950 }
1951 }
1954 /************************************************************************
1955 * Reading Symbols
1956 ***********************************************************************/
1958 /** Read a field.
1959 */
1960 VarSymbol readField() {
1961 long flags = adjustFieldFlags(nextChar());
1962 Name name = readName(nextChar());
1963 Type type = readType(nextChar());
1964 VarSymbol v = new VarSymbol(flags, name, type, currentOwner);
1965 readMemberAttrs(v);
1966 return v;
1967 }
1969 /** Read a method.
1970 */
1971 MethodSymbol readMethod() {
1972 long flags = adjustMethodFlags(nextChar());
1973 Name name = readName(nextChar());
1974 Type type = readType(nextChar());
1975 if (currentOwner.isInterface() &&
1976 (flags & ABSTRACT) == 0 && !name.equals(names.clinit)) {
1977 if (majorVersion > Target.JDK1_8.majorVersion ||
1978 (majorVersion == Target.JDK1_8.majorVersion && minorVersion >= Target.JDK1_8.minorVersion)) {
1979 currentOwner.flags_field |= DEFAULT;
1980 flags |= DEFAULT | ABSTRACT;
1981 } else {
1982 //protect against ill-formed classfiles
1983 throw new CompletionFailure(currentOwner, "default method found in pre JDK 8 classfile");
1984 }
1985 }
1986 if (name == names.init && currentOwner.hasOuterInstance()) {
1987 // Sometimes anonymous classes don't have an outer
1988 // instance, however, there is no reliable way to tell so
1989 // we never strip this$n
1990 if (!currentOwner.name.isEmpty())
1991 type = new MethodType(adjustMethodParams(flags, type.getParameterTypes()),
1992 type.getReturnType(),
1993 type.getThrownTypes(),
1994 syms.methodClass);
1995 }
1996 MethodSymbol m = new MethodSymbol(flags, name, type, currentOwner);
1997 if (types.isSignaturePolymorphic(m)) {
1998 m.flags_field |= SIGNATURE_POLYMORPHIC;
1999 }
2000 if (saveParameterNames)
2001 initParameterNames(m);
2002 Symbol prevOwner = currentOwner;
2003 currentOwner = m;
2004 try {
2005 readMemberAttrs(m);
2006 } finally {
2007 currentOwner = prevOwner;
2008 }
2009 if (saveParameterNames)
2010 setParameterNames(m, type);
2011 return m;
2012 }
2014 private List<Type> adjustMethodParams(long flags, List<Type> args) {
2015 boolean isVarargs = (flags & VARARGS) != 0;
2016 if (isVarargs) {
2017 Type varargsElem = args.last();
2018 ListBuffer<Type> adjustedArgs = ListBuffer.lb();
2019 for (Type t : args) {
2020 adjustedArgs.append(t != varargsElem ?
2021 t :
2022 ((ArrayType)t).makeVarargs());
2023 }
2024 args = adjustedArgs.toList();
2025 }
2026 return args.tail;
2027 }
2029 /**
2030 * Init the parameter names array.
2031 * Parameter names are currently inferred from the names in the
2032 * LocalVariableTable attributes of a Code attribute.
2033 * (Note: this means parameter names are currently not available for
2034 * methods without a Code attribute.)
2035 * This method initializes an array in which to store the name indexes
2036 * of parameter names found in LocalVariableTable attributes. It is
2037 * slightly supersized to allow for additional slots with a start_pc of 0.
2038 */
2039 void initParameterNames(MethodSymbol sym) {
2040 // make allowance for synthetic parameters.
2041 final int excessSlots = 4;
2042 int expectedParameterSlots =
2043 Code.width(sym.type.getParameterTypes()) + excessSlots;
2044 if (parameterNameIndices == null
2045 || parameterNameIndices.length < expectedParameterSlots) {
2046 parameterNameIndices = new int[expectedParameterSlots];
2047 } else
2048 Arrays.fill(parameterNameIndices, 0);
2049 haveParameterNameIndices = false;
2050 sawMethodParameters = false;
2051 }
2053 /**
2054 * Set the parameter names for a symbol from the name index in the
2055 * parameterNameIndicies array. The type of the symbol may have changed
2056 * while reading the method attributes (see the Signature attribute).
2057 * This may be because of generic information or because anonymous
2058 * synthetic parameters were added. The original type (as read from
2059 * the method descriptor) is used to help guess the existence of
2060 * anonymous synthetic parameters.
2061 * On completion, sym.savedParameter names will either be null (if
2062 * no parameter names were found in the class file) or will be set to a
2063 * list of names, one per entry in sym.type.getParameterTypes, with
2064 * any missing names represented by the empty name.
2065 */
2066 void setParameterNames(MethodSymbol sym, Type jvmType) {
2067 // if no names were found in the class file, there's nothing more to do
2068 if (!haveParameterNameIndices)
2069 return;
2070 // If we get parameter names from MethodParameters, then we
2071 // don't need to skip.
2072 int firstParam = 0;
2073 if (!sawMethodParameters) {
2074 firstParam = ((sym.flags() & STATIC) == 0) ? 1 : 0;
2075 // the code in readMethod may have skipped the first
2076 // parameter when setting up the MethodType. If so, we
2077 // make a corresponding allowance here for the position of
2078 // the first parameter. Note that this assumes the
2079 // skipped parameter has a width of 1 -- i.e. it is not
2080 // a double width type (long or double.)
2081 if (sym.name == names.init && currentOwner.hasOuterInstance()) {
2082 // Sometimes anonymous classes don't have an outer
2083 // instance, however, there is no reliable way to tell so
2084 // we never strip this$n
2085 if (!currentOwner.name.isEmpty())
2086 firstParam += 1;
2087 }
2089 if (sym.type != jvmType) {
2090 // reading the method attributes has caused the
2091 // symbol's type to be changed. (i.e. the Signature
2092 // attribute.) This may happen if there are hidden
2093 // (synthetic) parameters in the descriptor, but not
2094 // in the Signature. The position of these hidden
2095 // parameters is unspecified; for now, assume they are
2096 // at the beginning, and so skip over them. The
2097 // primary case for this is two hidden parameters
2098 // passed into Enum constructors.
2099 int skip = Code.width(jvmType.getParameterTypes())
2100 - Code.width(sym.type.getParameterTypes());
2101 firstParam += skip;
2102 }
2103 }
2104 List<Name> paramNames = List.nil();
2105 int index = firstParam;
2106 for (Type t: sym.type.getParameterTypes()) {
2107 int nameIdx = (index < parameterNameIndices.length
2108 ? parameterNameIndices[index] : 0);
2109 Name name = nameIdx == 0 ? names.empty : readName(nameIdx);
2110 paramNames = paramNames.prepend(name);
2111 index += Code.width(t);
2112 }
2113 sym.savedParameterNames = paramNames.reverse();
2114 }
2116 /**
2117 * skip n bytes
2118 */
2119 void skipBytes(int n) {
2120 bp = bp + n;
2121 }
2123 /** Skip a field or method
2124 */
2125 void skipMember() {
2126 bp = bp + 6;
2127 char ac = nextChar();
2128 for (int i = 0; i < ac; i++) {
2129 bp = bp + 2;
2130 int attrLen = nextInt();
2131 bp = bp + attrLen;
2132 }
2133 }
2135 /** Enter type variables of this classtype and all enclosing ones in
2136 * `typevars'.
2137 */
2138 protected void enterTypevars(Type t) {
2139 if (t.getEnclosingType() != null && t.getEnclosingType().hasTag(CLASS))
2140 enterTypevars(t.getEnclosingType());
2141 for (List<Type> xs = t.getTypeArguments(); xs.nonEmpty(); xs = xs.tail)
2142 typevars.enter(xs.head.tsym);
2143 }
2145 protected void enterTypevars(Symbol sym) {
2146 if (sym.owner.kind == MTH) {
2147 enterTypevars(sym.owner);
2148 enterTypevars(sym.owner.owner);
2149 }
2150 enterTypevars(sym.type);
2151 }
2153 /** Read contents of a given class symbol `c'. Both external and internal
2154 * versions of an inner class are read.
2155 */
2156 void readClass(ClassSymbol c) {
2157 ClassType ct = (ClassType)c.type;
2159 // allocate scope for members
2160 c.members_field = new Scope(c);
2162 // prepare type variable table
2163 typevars = typevars.dup(currentOwner);
2164 if (ct.getEnclosingType().hasTag(CLASS))
2165 enterTypevars(ct.getEnclosingType());
2167 // read flags, or skip if this is an inner class
2168 long flags = adjustClassFlags(nextChar());
2169 if (c.owner.kind == PCK) c.flags_field = flags;
2171 // read own class name and check that it matches
2172 ClassSymbol self = readClassSymbol(nextChar());
2173 if (c != self)
2174 throw badClassFile("class.file.wrong.class",
2175 self.flatname);
2177 // class attributes must be read before class
2178 // skip ahead to read class attributes
2179 int startbp = bp;
2180 nextChar();
2181 char interfaceCount = nextChar();
2182 bp += interfaceCount * 2;
2183 char fieldCount = nextChar();
2184 for (int i = 0; i < fieldCount; i++) skipMember();
2185 char methodCount = nextChar();
2186 for (int i = 0; i < methodCount; i++) skipMember();
2187 readClassAttrs(c);
2189 if (readAllOfClassFile) {
2190 for (int i = 1; i < poolObj.length; i++) readPool(i);
2191 c.pool = new Pool(poolObj.length, poolObj, types);
2192 }
2194 // reset and read rest of classinfo
2195 bp = startbp;
2196 int n = nextChar();
2197 if (ct.supertype_field == null)
2198 ct.supertype_field = (n == 0)
2199 ? Type.noType
2200 : readClassSymbol(n).erasure(types);
2201 n = nextChar();
2202 List<Type> is = List.nil();
2203 for (int i = 0; i < n; i++) {
2204 Type _inter = readClassSymbol(nextChar()).erasure(types);
2205 is = is.prepend(_inter);
2206 }
2207 if (ct.interfaces_field == null)
2208 ct.interfaces_field = is.reverse();
2210 Assert.check(fieldCount == nextChar());
2211 for (int i = 0; i < fieldCount; i++) enterMember(c, readField());
2212 Assert.check(methodCount == nextChar());
2213 for (int i = 0; i < methodCount; i++) enterMember(c, readMethod());
2215 typevars = typevars.leave();
2216 }
2218 /** Read inner class info. For each inner/outer pair allocate a
2219 * member class.
2220 */
2221 void readInnerClasses(ClassSymbol c) {
2222 int n = nextChar();
2223 for (int i = 0; i < n; i++) {
2224 nextChar(); // skip inner class symbol
2225 ClassSymbol outer = readClassSymbol(nextChar());
2226 Name name = readName(nextChar());
2227 if (name == null) name = names.empty;
2228 long flags = adjustClassFlags(nextChar());
2229 if (outer != null) { // we have a member class
2230 if (name == names.empty)
2231 name = names.one;
2232 ClassSymbol member = enterClass(name, outer);
2233 if ((flags & STATIC) == 0) {
2234 ((ClassType)member.type).setEnclosingType(outer.type);
2235 if (member.erasure_field != null)
2236 ((ClassType)member.erasure_field).setEnclosingType(types.erasure(outer.type));
2237 }
2238 if (c == outer) {
2239 member.flags_field = flags;
2240 enterMember(c, member);
2241 }
2242 }
2243 }
2244 }
2246 /** Read a class file.
2247 */
2248 private void readClassFile(ClassSymbol c) throws IOException {
2249 int magic = nextInt();
2250 if (magic != JAVA_MAGIC)
2251 throw badClassFile("illegal.start.of.class.file");
2253 minorVersion = nextChar();
2254 majorVersion = nextChar();
2255 int maxMajor = Target.MAX().majorVersion;
2256 int maxMinor = Target.MAX().minorVersion;
2257 if (majorVersion > maxMajor ||
2258 majorVersion * 1000 + minorVersion <
2259 Target.MIN().majorVersion * 1000 + Target.MIN().minorVersion)
2260 {
2261 if (majorVersion == (maxMajor + 1))
2262 log.warning("big.major.version",
2263 currentClassFile,
2264 majorVersion,
2265 maxMajor);
2266 else
2267 throw badClassFile("wrong.version",
2268 Integer.toString(majorVersion),
2269 Integer.toString(minorVersion),
2270 Integer.toString(maxMajor),
2271 Integer.toString(maxMinor));
2272 }
2273 else if (checkClassFile &&
2274 majorVersion == maxMajor &&
2275 minorVersion > maxMinor)
2276 {
2277 printCCF("found.later.version",
2278 Integer.toString(minorVersion));
2279 }
2280 indexPool();
2281 if (signatureBuffer.length < bp) {
2282 int ns = Integer.highestOneBit(bp) << 1;
2283 signatureBuffer = new byte[ns];
2284 }
2285 readClass(c);
2286 }
2288 /************************************************************************
2289 * Adjusting flags
2290 ***********************************************************************/
2292 long adjustFieldFlags(long flags) {
2293 return flags;
2294 }
2295 long adjustMethodFlags(long flags) {
2296 if ((flags & ACC_BRIDGE) != 0) {
2297 flags &= ~ACC_BRIDGE;
2298 flags |= BRIDGE;
2299 if (!allowGenerics)
2300 flags &= ~SYNTHETIC;
2301 }
2302 if ((flags & ACC_VARARGS) != 0) {
2303 flags &= ~ACC_VARARGS;
2304 flags |= VARARGS;
2305 }
2306 return flags;
2307 }
2308 long adjustClassFlags(long flags) {
2309 return flags & ~ACC_SUPER; // SUPER and SYNCHRONIZED bits overloaded
2310 }
2312 /************************************************************************
2313 * Loading Classes
2314 ***********************************************************************/
2316 /** Define a new class given its name and owner.
2317 */
2318 public ClassSymbol defineClass(Name name, Symbol owner) {
2319 ClassSymbol c = new ClassSymbol(0, name, owner);
2320 if (owner.kind == PCK)
2321 Assert.checkNull(classes.get(c.flatname), c);
2322 c.completer = this;
2323 return c;
2324 }
2326 /** Create a new toplevel or member class symbol with given name
2327 * and owner and enter in `classes' unless already there.
2328 */
2329 public ClassSymbol enterClass(Name name, TypeSymbol owner) {
2330 Name flatname = TypeSymbol.formFlatName(name, owner);
2331 ClassSymbol c = classes.get(flatname);
2332 if (c == null) {
2333 c = defineClass(name, owner);
2334 classes.put(flatname, c);
2335 } else if ((c.name != name || c.owner != owner) && owner.kind == TYP && c.owner.kind == PCK) {
2336 // reassign fields of classes that might have been loaded with
2337 // their flat names.
2338 c.owner.members().remove(c);
2339 c.name = name;
2340 c.owner = owner;
2341 c.fullname = ClassSymbol.formFullName(name, owner);
2342 }
2343 return c;
2344 }
2346 /**
2347 * Creates a new toplevel class symbol with given flat name and
2348 * given class (or source) file.
2349 *
2350 * @param flatName a fully qualified binary class name
2351 * @param classFile the class file or compilation unit defining
2352 * the class (may be {@code null})
2353 * @return a newly created class symbol
2354 * @throws AssertionError if the class symbol already exists
2355 */
2356 public ClassSymbol enterClass(Name flatName, JavaFileObject classFile) {
2357 ClassSymbol cs = classes.get(flatName);
2358 if (cs != null) {
2359 String msg = Log.format("%s: completer = %s; class file = %s; source file = %s",
2360 cs.fullname,
2361 cs.completer,
2362 cs.classfile,
2363 cs.sourcefile);
2364 throw new AssertionError(msg);
2365 }
2366 Name packageName = Convert.packagePart(flatName);
2367 PackageSymbol owner = packageName.isEmpty()
2368 ? syms.unnamedPackage
2369 : enterPackage(packageName);
2370 cs = defineClass(Convert.shortName(flatName), owner);
2371 cs.classfile = classFile;
2372 classes.put(flatName, cs);
2373 return cs;
2374 }
2376 /** Create a new member or toplevel class symbol with given flat name
2377 * and enter in `classes' unless already there.
2378 */
2379 public ClassSymbol enterClass(Name flatname) {
2380 ClassSymbol c = classes.get(flatname);
2381 if (c == null)
2382 return enterClass(flatname, (JavaFileObject)null);
2383 else
2384 return c;
2385 }
2387 private boolean suppressFlush = false;
2389 /** Completion for classes to be loaded. Before a class is loaded
2390 * we make sure its enclosing class (if any) is loaded.
2391 */
2392 public void complete(Symbol sym) throws CompletionFailure {
2393 if (sym.kind == TYP) {
2394 ClassSymbol c = (ClassSymbol)sym;
2395 c.members_field = new Scope.ErrorScope(c); // make sure it's always defined
2396 boolean saveSuppressFlush = suppressFlush;
2397 suppressFlush = true;
2398 try {
2399 completeOwners(c.owner);
2400 completeEnclosing(c);
2401 } finally {
2402 suppressFlush = saveSuppressFlush;
2403 }
2404 fillIn(c);
2405 } else if (sym.kind == PCK) {
2406 PackageSymbol p = (PackageSymbol)sym;
2407 try {
2408 fillIn(p);
2409 } catch (IOException ex) {
2410 throw new CompletionFailure(sym, ex.getLocalizedMessage()).initCause(ex);
2411 }
2412 }
2413 if (!filling && !suppressFlush)
2414 annotate.flush(); // finish attaching annotations
2415 }
2417 /** complete up through the enclosing package. */
2418 private void completeOwners(Symbol o) {
2419 if (o.kind != PCK) completeOwners(o.owner);
2420 o.complete();
2421 }
2423 /**
2424 * Tries to complete lexically enclosing classes if c looks like a
2425 * nested class. This is similar to completeOwners but handles
2426 * the situation when a nested class is accessed directly as it is
2427 * possible with the Tree API or javax.lang.model.*.
2428 */
2429 private void completeEnclosing(ClassSymbol c) {
2430 if (c.owner.kind == PCK) {
2431 Symbol owner = c.owner;
2432 for (Name name : Convert.enclosingCandidates(Convert.shortName(c.name))) {
2433 Symbol encl = owner.members().lookup(name).sym;
2434 if (encl == null)
2435 encl = classes.get(TypeSymbol.formFlatName(name, owner));
2436 if (encl != null)
2437 encl.complete();
2438 }
2439 }
2440 }
2442 /** We can only read a single class file at a time; this
2443 * flag keeps track of when we are currently reading a class
2444 * file.
2445 */
2446 private boolean filling = false;
2448 /** Fill in definition of class `c' from corresponding class or
2449 * source file.
2450 */
2451 private void fillIn(ClassSymbol c) {
2452 if (completionFailureName == c.fullname) {
2453 throw new CompletionFailure(c, "user-selected completion failure by class name");
2454 }
2455 currentOwner = c;
2456 warnedAttrs.clear();
2457 JavaFileObject classfile = c.classfile;
2458 if (classfile != null) {
2459 JavaFileObject previousClassFile = currentClassFile;
2460 try {
2461 if (filling) {
2462 Assert.error("Filling " + classfile.toUri() + " during " + previousClassFile);
2463 }
2464 currentClassFile = classfile;
2465 if (verbose) {
2466 log.printVerbose("loading", currentClassFile.toString());
2467 }
2468 if (classfile.getKind() == JavaFileObject.Kind.CLASS) {
2469 filling = true;
2470 try {
2471 bp = 0;
2472 buf = readInputStream(buf, classfile.openInputStream());
2473 readClassFile(c);
2474 if (!missingTypeVariables.isEmpty() && !foundTypeVariables.isEmpty()) {
2475 List<Type> missing = missingTypeVariables;
2476 List<Type> found = foundTypeVariables;
2477 missingTypeVariables = List.nil();
2478 foundTypeVariables = List.nil();
2479 filling = false;
2480 ClassType ct = (ClassType)currentOwner.type;
2481 ct.supertype_field =
2482 types.subst(ct.supertype_field, missing, found);
2483 ct.interfaces_field =
2484 types.subst(ct.interfaces_field, missing, found);
2485 } else if (missingTypeVariables.isEmpty() !=
2486 foundTypeVariables.isEmpty()) {
2487 Name name = missingTypeVariables.head.tsym.name;
2488 throw badClassFile("undecl.type.var", name);
2489 }
2490 } finally {
2491 missingTypeVariables = List.nil();
2492 foundTypeVariables = List.nil();
2493 filling = false;
2494 }
2495 } else {
2496 if (sourceCompleter != null) {
2497 sourceCompleter.complete(c);
2498 } else {
2499 throw new IllegalStateException("Source completer required to read "
2500 + classfile.toUri());
2501 }
2502 }
2503 return;
2504 } catch (IOException ex) {
2505 throw badClassFile("unable.to.access.file", ex.getMessage());
2506 } finally {
2507 currentClassFile = previousClassFile;
2508 }
2509 } else {
2510 JCDiagnostic diag =
2511 diagFactory.fragment("class.file.not.found", c.flatname);
2512 throw
2513 newCompletionFailure(c, diag);
2514 }
2515 }
2516 // where
2517 private static byte[] readInputStream(byte[] buf, InputStream s) throws IOException {
2518 try {
2519 buf = ensureCapacity(buf, s.available());
2520 int r = s.read(buf);
2521 int bp = 0;
2522 while (r != -1) {
2523 bp += r;
2524 buf = ensureCapacity(buf, bp);
2525 r = s.read(buf, bp, buf.length - bp);
2526 }
2527 return buf;
2528 } finally {
2529 try {
2530 s.close();
2531 } catch (IOException e) {
2532 /* Ignore any errors, as this stream may have already
2533 * thrown a related exception which is the one that
2534 * should be reported.
2535 */
2536 }
2537 }
2538 }
2539 /*
2540 * ensureCapacity will increase the buffer as needed, taking note that
2541 * the new buffer will always be greater than the needed and never
2542 * exactly equal to the needed size or bp. If equal then the read (above)
2543 * will infinitely loop as buf.length - bp == 0.
2544 */
2545 private static byte[] ensureCapacity(byte[] buf, int needed) {
2546 if (buf.length <= needed) {
2547 byte[] old = buf;
2548 buf = new byte[Integer.highestOneBit(needed) << 1];
2549 System.arraycopy(old, 0, buf, 0, old.length);
2550 }
2551 return buf;
2552 }
2553 /** Static factory for CompletionFailure objects.
2554 * In practice, only one can be used at a time, so we share one
2555 * to reduce the expense of allocating new exception objects.
2556 */
2557 private CompletionFailure newCompletionFailure(TypeSymbol c,
2558 JCDiagnostic diag) {
2559 if (!cacheCompletionFailure) {
2560 // log.warning("proc.messager",
2561 // Log.getLocalizedString("class.file.not.found", c.flatname));
2562 // c.debug.printStackTrace();
2563 return new CompletionFailure(c, diag);
2564 } else {
2565 CompletionFailure result = cachedCompletionFailure;
2566 result.sym = c;
2567 result.diag = diag;
2568 return result;
2569 }
2570 }
2571 private CompletionFailure cachedCompletionFailure =
2572 new CompletionFailure(null, (JCDiagnostic) null);
2573 {
2574 cachedCompletionFailure.setStackTrace(new StackTraceElement[0]);
2575 }
2577 /** Load a toplevel class with given fully qualified name
2578 * The class is entered into `classes' only if load was successful.
2579 */
2580 public ClassSymbol loadClass(Name flatname) throws CompletionFailure {
2581 boolean absent = classes.get(flatname) == null;
2582 ClassSymbol c = enterClass(flatname);
2583 if (c.members_field == null && c.completer != null) {
2584 try {
2585 c.complete();
2586 } catch (CompletionFailure ex) {
2587 if (absent) classes.remove(flatname);
2588 throw ex;
2589 }
2590 }
2591 return c;
2592 }
2594 /************************************************************************
2595 * Loading Packages
2596 ***********************************************************************/
2598 /** Check to see if a package exists, given its fully qualified name.
2599 */
2600 public boolean packageExists(Name fullname) {
2601 return enterPackage(fullname).exists();
2602 }
2604 /** Make a package, given its fully qualified name.
2605 */
2606 public PackageSymbol enterPackage(Name fullname) {
2607 PackageSymbol p = packages.get(fullname);
2608 if (p == null) {
2609 Assert.check(!fullname.isEmpty(), "rootPackage missing!");
2610 p = new PackageSymbol(
2611 Convert.shortName(fullname),
2612 enterPackage(Convert.packagePart(fullname)));
2613 p.completer = this;
2614 packages.put(fullname, p);
2615 }
2616 return p;
2617 }
2619 /** Make a package, given its unqualified name and enclosing package.
2620 */
2621 public PackageSymbol enterPackage(Name name, PackageSymbol owner) {
2622 return enterPackage(TypeSymbol.formFullName(name, owner));
2623 }
2625 /** Include class corresponding to given class file in package,
2626 * unless (1) we already have one the same kind (.class or .java), or
2627 * (2) we have one of the other kind, and the given class file
2628 * is older.
2629 */
2630 protected void includeClassFile(PackageSymbol p, JavaFileObject file) {
2631 if ((p.flags_field & EXISTS) == 0)
2632 for (Symbol q = p; q != null && q.kind == PCK; q = q.owner)
2633 q.flags_field |= EXISTS;
2634 JavaFileObject.Kind kind = file.getKind();
2635 int seen;
2636 if (kind == JavaFileObject.Kind.CLASS)
2637 seen = CLASS_SEEN;
2638 else
2639 seen = SOURCE_SEEN;
2640 String binaryName = fileManager.inferBinaryName(currentLoc, file);
2641 int lastDot = binaryName.lastIndexOf(".");
2642 Name classname = names.fromString(binaryName.substring(lastDot + 1));
2643 boolean isPkgInfo = classname == names.package_info;
2644 ClassSymbol c = isPkgInfo
2645 ? p.package_info
2646 : (ClassSymbol) p.members_field.lookup(classname).sym;
2647 if (c == null) {
2648 c = enterClass(classname, p);
2649 if (c.classfile == null) // only update the file if's it's newly created
2650 c.classfile = file;
2651 if (isPkgInfo) {
2652 p.package_info = c;
2653 } else {
2654 if (c.owner == p) // it might be an inner class
2655 p.members_field.enter(c);
2656 }
2657 } else if (c.classfile != null && (c.flags_field & seen) == 0) {
2658 // if c.classfile == null, we are currently compiling this class
2659 // and no further action is necessary.
2660 // if (c.flags_field & seen) != 0, we have already encountered
2661 // a file of the same kind; again no further action is necessary.
2662 if ((c.flags_field & (CLASS_SEEN | SOURCE_SEEN)) != 0)
2663 c.classfile = preferredFileObject(file, c.classfile);
2664 }
2665 c.flags_field |= seen;
2666 }
2668 /** Implement policy to choose to derive information from a source
2669 * file or a class file when both are present. May be overridden
2670 * by subclasses.
2671 */
2672 protected JavaFileObject preferredFileObject(JavaFileObject a,
2673 JavaFileObject b) {
2675 if (preferSource)
2676 return (a.getKind() == JavaFileObject.Kind.SOURCE) ? a : b;
2677 else {
2678 long adate = a.getLastModified();
2679 long bdate = b.getLastModified();
2680 // 6449326: policy for bad lastModifiedTime in ClassReader
2681 //assert adate >= 0 && bdate >= 0;
2682 return (adate > bdate) ? a : b;
2683 }
2684 }
2686 /**
2687 * specifies types of files to be read when filling in a package symbol
2688 */
2689 protected EnumSet<JavaFileObject.Kind> getPackageFileKinds() {
2690 return EnumSet.of(JavaFileObject.Kind.CLASS, JavaFileObject.Kind.SOURCE);
2691 }
2693 /**
2694 * this is used to support javadoc
2695 */
2696 protected void extraFileActions(PackageSymbol pack, JavaFileObject fe) {
2697 }
2699 protected Location currentLoc; // FIXME
2701 private boolean verbosePath = true;
2703 /** Load directory of package into members scope.
2704 */
2705 private void fillIn(PackageSymbol p) throws IOException {
2706 if (p.members_field == null) p.members_field = new Scope(p);
2707 String packageName = p.fullname.toString();
2709 Set<JavaFileObject.Kind> kinds = getPackageFileKinds();
2711 fillIn(p, PLATFORM_CLASS_PATH,
2712 fileManager.list(PLATFORM_CLASS_PATH,
2713 packageName,
2714 EnumSet.of(JavaFileObject.Kind.CLASS),
2715 false));
2717 Set<JavaFileObject.Kind> classKinds = EnumSet.copyOf(kinds);
2718 classKinds.remove(JavaFileObject.Kind.SOURCE);
2719 boolean wantClassFiles = !classKinds.isEmpty();
2721 Set<JavaFileObject.Kind> sourceKinds = EnumSet.copyOf(kinds);
2722 sourceKinds.remove(JavaFileObject.Kind.CLASS);
2723 boolean wantSourceFiles = !sourceKinds.isEmpty();
2725 boolean haveSourcePath = fileManager.hasLocation(SOURCE_PATH);
2727 if (verbose && verbosePath) {
2728 if (fileManager instanceof StandardJavaFileManager) {
2729 StandardJavaFileManager fm = (StandardJavaFileManager)fileManager;
2730 if (haveSourcePath && wantSourceFiles) {
2731 List<File> path = List.nil();
2732 for (File file : fm.getLocation(SOURCE_PATH)) {
2733 path = path.prepend(file);
2734 }
2735 log.printVerbose("sourcepath", path.reverse().toString());
2736 } else if (wantSourceFiles) {
2737 List<File> path = List.nil();
2738 for (File file : fm.getLocation(CLASS_PATH)) {
2739 path = path.prepend(file);
2740 }
2741 log.printVerbose("sourcepath", path.reverse().toString());
2742 }
2743 if (wantClassFiles) {
2744 List<File> path = List.nil();
2745 for (File file : fm.getLocation(PLATFORM_CLASS_PATH)) {
2746 path = path.prepend(file);
2747 }
2748 for (File file : fm.getLocation(CLASS_PATH)) {
2749 path = path.prepend(file);
2750 }
2751 log.printVerbose("classpath", path.reverse().toString());
2752 }
2753 }
2754 }
2756 if (wantSourceFiles && !haveSourcePath) {
2757 fillIn(p, CLASS_PATH,
2758 fileManager.list(CLASS_PATH,
2759 packageName,
2760 kinds,
2761 false));
2762 } else {
2763 if (wantClassFiles)
2764 fillIn(p, CLASS_PATH,
2765 fileManager.list(CLASS_PATH,
2766 packageName,
2767 classKinds,
2768 false));
2769 if (wantSourceFiles)
2770 fillIn(p, SOURCE_PATH,
2771 fileManager.list(SOURCE_PATH,
2772 packageName,
2773 sourceKinds,
2774 false));
2775 }
2776 verbosePath = false;
2777 }
2778 // where
2779 private void fillIn(PackageSymbol p,
2780 Location location,
2781 Iterable<JavaFileObject> files)
2782 {
2783 currentLoc = location;
2784 for (JavaFileObject fo : files) {
2785 switch (fo.getKind()) {
2786 case CLASS:
2787 case SOURCE: {
2788 // TODO pass binaryName to includeClassFile
2789 String binaryName = fileManager.inferBinaryName(currentLoc, fo);
2790 String simpleName = binaryName.substring(binaryName.lastIndexOf(".") + 1);
2791 if (SourceVersion.isIdentifier(simpleName) ||
2792 simpleName.equals("package-info"))
2793 includeClassFile(p, fo);
2794 break;
2795 }
2796 default:
2797 extraFileActions(p, fo);
2798 }
2799 }
2800 }
2802 /** Output for "-checkclassfile" option.
2803 * @param key The key to look up the correct internationalized string.
2804 * @param arg An argument for substitution into the output string.
2805 */
2806 private void printCCF(String key, Object arg) {
2807 log.printLines(key, arg);
2808 }
2811 public interface SourceCompleter {
2812 void complete(ClassSymbol sym)
2813 throws CompletionFailure;
2814 }
2816 /**
2817 * A subclass of JavaFileObject for the sourcefile attribute found in a classfile.
2818 * The attribute is only the last component of the original filename, so is unlikely
2819 * to be valid as is, so operations other than those to access the name throw
2820 * UnsupportedOperationException
2821 */
2822 private static class SourceFileObject extends BaseFileObject {
2824 /** The file's name.
2825 */
2826 private Name name;
2827 private Name flatname;
2829 public SourceFileObject(Name name, Name flatname) {
2830 super(null); // no file manager; never referenced for this file object
2831 this.name = name;
2832 this.flatname = flatname;
2833 }
2835 @Override
2836 public URI toUri() {
2837 try {
2838 return new URI(null, name.toString(), null);
2839 } catch (URISyntaxException e) {
2840 throw new CannotCreateUriError(name.toString(), e);
2841 }
2842 }
2844 @Override
2845 public String getName() {
2846 return name.toString();
2847 }
2849 @Override
2850 public String getShortName() {
2851 return getName();
2852 }
2854 @Override
2855 public JavaFileObject.Kind getKind() {
2856 return getKind(getName());
2857 }
2859 @Override
2860 public InputStream openInputStream() {
2861 throw new UnsupportedOperationException();
2862 }
2864 @Override
2865 public OutputStream openOutputStream() {
2866 throw new UnsupportedOperationException();
2867 }
2869 @Override
2870 public CharBuffer getCharContent(boolean ignoreEncodingErrors) {
2871 throw new UnsupportedOperationException();
2872 }
2874 @Override
2875 public Reader openReader(boolean ignoreEncodingErrors) {
2876 throw new UnsupportedOperationException();
2877 }
2879 @Override
2880 public Writer openWriter() {
2881 throw new UnsupportedOperationException();
2882 }
2884 @Override
2885 public long getLastModified() {
2886 throw new UnsupportedOperationException();
2887 }
2889 @Override
2890 public boolean delete() {
2891 throw new UnsupportedOperationException();
2892 }
2894 @Override
2895 protected String inferBinaryName(Iterable<? extends File> path) {
2896 return flatname.toString();
2897 }
2899 @Override
2900 public boolean isNameCompatible(String simpleName, JavaFileObject.Kind kind) {
2901 return true; // fail-safe mode
2902 }
2904 /**
2905 * Check if two file objects are equal.
2906 * SourceFileObjects are just placeholder objects for the value of a
2907 * SourceFile attribute, and do not directly represent specific files.
2908 * Two SourceFileObjects are equal if their names are equal.
2909 */
2910 @Override
2911 public boolean equals(Object other) {
2912 if (this == other)
2913 return true;
2915 if (!(other instanceof SourceFileObject))
2916 return false;
2918 SourceFileObject o = (SourceFileObject) other;
2919 return name.equals(o.name);
2920 }
2922 @Override
2923 public int hashCode() {
2924 return name.hashCode();
2925 }
2926 }
2927 }
